Apparatus for whipping conductors



April 9, 1946. A, c. FRANKWICH APPARATUS FOR WHIPPING CONDUC'IOR S 4 Sheets-Shet 1 Filed Nov. 2, 1944 FIG.

m/ /\V H IIIIHL I W A lNl/ENTOR ACFRANKW/CH ATTORNE WLIIII-ll .l L

April 1946- A. c. FRANKWICH 2,398,217

APPARATUS FOR WHIPPING' CONDUCTORS Filed Nov. 2, 1944 4 Sheets-Sheet 2 1 V ATTORNEY April 9, 1946. A. c. FRANKWICH Filed NOV. 2, 1944 APPARATUS FOR WHIPPING CONDUCTORS 4 Sheets-Sheet 3 A T'TORAE V Patented Apr. 9, 1946 UNITED STATES PATENT OFFICE" APPARATUS FOR WHIPPING CONDUCTORS Application November 2, 1944, Serial No. 561,611

1'1 Claims.

This invention relates to apparatus for whipping conductors, and more particularly to apparatus for whipping conductors with wire.

In the manufacture of communication cords, it is sometimes necessary to whip the. ends of conductors. of such cords with. wire; In such whipping operations, it is necessary that the lengths of. the whippings on the ends of the conductors be uniform.

An object of the invention is to provide new and improved apparatusfor whipping conductors.

One apparatus embodying the invention includes means for holding a conductor, means for whipping a. conductor held by the holding means, means for effecting relative movement between the holding means and the whipping means, and means for indexing the whipping means and the holding means with respect to each other at the end of a whipping operation;

A complete understanding of the invention may be obtained from the following detailed description of. a specific embodiment thereof, when read in conjunction with the appended. drawings, in which:

Fig. 1 is a front elevation of an apparatus embociying the invention with portions thereof broken away;

Fig. 2 is a vertical sectional view taken along. line 2-2 of Fig. 1;

Fig. 3' is annenlarged, fragmentary, vertical sectional view taken along: line 3-3 of Fig. 2;

Fig. 4 is an enlarged, fragmentary; vertical sectional view taken along line 4-4 of Fig. 2;

Fig. 5 is a diagrammatical view of an electric circuit for controlling the operation of the apparatus, and

Fig. 6 is a fragmentary, vertical sectional view of the apparatus.

Referring. more in detail; to the drawings, there is illustrated: therein an apparatus for serving wire in neat convolutions upon ends of conductors- This apparatus includes a housing [6: (Fig. l)- enclosing a motor H, which", when energized, serves torotate a pulley" l2, which drives a belt 53 to rotate a pulley I 4. (Fig. 20?. The pulley i4 is affixed to a. driving clutch disc k5,. which is rotatable upon a flanged bushing 16. A manually operable switch l1 (Fig. 19' serves tocontrol the operation of the motor H and when the switch is turned on, the motor runs continuously, whereby the pulley M (Fig. 2') and the driving clutch disc are rotated continuously.

The flanged. bushing I6 is secured in a journal serves to support one end of a hollow shaft 22 and the other end of the shaft is supported rotatably in a journal 23 mounted on a standard 24. The shaft 22 is free to rotate in the bushing; l6 and the journal 23, but is prevented from axial movement relative thereto by a whipping head 25 of standard construction secured on the outer end of the shaft and by a collar 21 secured on the other end of the shaft,

A compression spring 26 is mounted on the shaft 22 between a collar 30' and a collar 3l,.which latter collar is threaded upon a threaded bossv 32 projecting from a brake drum 33. The brake drum 33 is slidable on the shaft 22 but is held against rotation relative thereto by keys 34-34 (Fig. 3). A driven clutch. disc 35 (Fig. 2) is secured. to the brake drum. 33.

A collar 4| (Figs. 2 and 3) mounted. loosely on the collar 3| has pins -40. projecting from the sides thereof; The pins 40-40 are engaged by a yoke 42, which. has slots 43-43 in the. arms thereof. The yoke 42 is fastened rigidly to a shaft 44, which is rotatably mounted. in bores 45-45 formed in arms 46 and 41 ofa. frame 56.

An arm 5| (Figs. 2 and 3) rigidly secured. to the shaft 44 is connected by a link. 52 to an arm 53. The arm 53 is fastened securely to a shaft 54 rotatably mounted in'bearings 51-51, carried by a motor support. 55. An arm 56 (Figs. land 2) secured to the shaft 54 is connected by an adjustable link 66 to a pin 6|, which pivotallyconnects the link 60 to a core 62 of a solenoid. 63. A pair of tension springs 64-64 (Fig. 1-) are secured to the pin 61- and screws -65,. which pass through tapped bores 66-66 formed in the motor support 55.

The springs 64-64: hold the core 62 of the solenoid 63 in a raised position when. a winding 79. (Figs. 1 and 5')' of the solenoid is not energized. However, when the winding. is: energized, thecore 62 is drawn downwardly which draws the link Bl) downwardly against theaction. of the springs 64-64, The link 66 through the arm 56 then serves to rotate the shaft 54' and the arm 53 in a clockwise direction, as viewed in Fig, 2; This moves the link 52 to the left and causes the shaft 44 to be rotated in a counterclockwise direction through the arm 5|, whereby' the yoke 42 through the pins 46-40 moves the collar M to the right. This permits the compression spring 26 to urge the brake drum 33 to the right and causes the driven clutch disc 35' to be carried by the. brake drum into an engagement with the 23 mounted on. a standard 2|. The bushing I6 as driving clutch disc IS. The driving clutch disc I then rotates the shaft 22 through the driven clutch disc 35, the brake drum 33, and the keys 34-34. When the winding I0 of the solenoid 63 is de-energized, the springs 64-64, through the system of levers just-described, cause the yoke 42 to thrust the collar 4I toward the left, and the collar 4I moves the brake drum 33 and the driven clutch disc 35 toward the left against the action of the spring 26, whereby the clutch disc 35 is drawn out of engagement with the clutch disc I5.

An arm II (Figs. 2 and 3) secured to the shaft 54 is connected by a link I2 to an arm 13 fastened to a shaft I4. The shaft I4 is rotatably mounted in bores 15-15 formed in the arms 46 and 41 of the frame 50. An arm I6 also is secured to the shaft I4 and one end of a tension spring 80 is connected to the outer end thereof. The other end of the tension spring 80 is fastened to an eye 8| secured to one end of a brake band 82. The other end of the brake band 82 is secured to a rod 83 adjustably mounted on a bracket 84.

When the winding 10 (Fig. 2) of the solenoid 63 is not energized, the tension spring 80 holds the brake band 82 into braking engagement with the brake drum 33. But when the winding I0 is energized and the shaft 54 is rotated in a clockwise direction, as viewed in Fig. 2, the arm H through the link 12 rotates the arm 13 in a clockwise direction. This rotates the shaft 14 and the arm I6 in a clockwise direction, whereby the spring 80 is lowered and the brake band 82 drops out of braking engagement with the brake drum 33. When the winding I0 of the solenoid 63 is again de-energized, the brake band 82 is brought into braking engagement with the brake drum. An arm 85 (Figs. 2 and 3) secured to the shaft 54 is connected by a link 86 to an arm 90 mounted on a shaft 9|. The shaft 81 is rotatably and slidably mounted in bores 9292 formed in the arms 46 and 41 (Fig. 3). A compression spring 34 is positioned on the shaft 9| between the arm 46 and a collar 95 secured to the shaft and urges the shaft toward the right, as viewed in Fig. 3. The movement of the shaft 9| toward the right is limited by a collar 96 secured thereto in a position adjacent to the arm 41.

When the winding I0 (Fig. 2) of the solenoid 63 is energized, so that the brake band 82 is moved out of braking engagement with the brake drum 83 and the driven clutch disc 35 is moved into engagement with the driving clutch disc I5, the arm 85 is turned by the shaft 54 in a clockwise direction, as viewed in Fig. 2, whereby the link 88 is raised. The link 86 raises the end of the arm 90 so that an indexing lug 93 secured to the brake drum 33 is'free to move past the arm 90. When the winding I0 of the solenoid is ole-energized, the clutch disc 35 is moved out of engagement with the clutch disc I5, the brake band 82 is moved into engagement with the brake drum 33, and the arm 90 is rotated in clockwise direction, as viewed in Fig. 2, and is positioned in the path of the indexing lug 93. When this occurs, the brake band 82 slows therotation of the brake drum 33 and the shaft 22 so that when the indexing lug 93 strikes the arm 90 most of its force has been dissipated. However, any force retained by the revolving brake drum 33 and indexing lug 93 is dissipated when the indexing lug strikes the arm 90. Since the shaft 9| is free to slide in the bores 92-92 against the action of the compression spring 94, any shock imparted by the indexing lug 93 to the arm 90 is absorbed by the compression spring 94 while the rotation of the brake drum 33, the shaft 22 and the whipping head 25 are stopped in positions in which the whipping head is in a position convenient to start a whipping operation.

A worm gear I00 (Fig. 2) rigidly secured to the shaft 22 meshes with a gear IOI having a plurality of teeth I08-I08 thereonand secured to a shaft I02. A cam I03 having lobes I04 and I05 formed therein is secured to the shaft I02. A cam follower I06 is mounted on a block I07, which is secured to rods H0 and III. The rods are mounted slidably in bores II2--II2 formed in standards H3 and H4 and have a block II5 secured on the left ends thereof, as seen in Fig. 2, which mounts a work-holder I I6. A pair of compression springs I20-I20 are mounted between a fixed abutment II 3 and collars I2I--I2I fixed to the rods I I 0 and II I. The compression springs I20--I20 urge the rods H0 and III to the right, as viewed in Fig. 2, and maintain the cam follower I06 against the periphery of the cam I 03.

When the shaft 22 is rotated, the worm'gear I00 is rotated and turns the gear IOI in a clockwise direction, as viewed in Fig. 2. The gear IOI turns the shaft I02, which turns the cam I03 in a clockwise direction. The cam I03 moves the cam follower I06, the rods H0 and III, and the work-holder I I6 to the left as the cam is rotated so that the cam follower I06 engages the periphery of the cam I06, which raises gradually from a depression II8 to the lobe I05, whereby any work positioned on the work-holder is moved at a uniform-rate of speed to the left relative to the whipping head 25. The work-holder H6 is moved back to the right by the action of the compression springs I20-I20 when the cam follower I06 passes over the lobe I05 and drops into a depression I I1 formed on the periphery of the cam I03.

An adjustment screw I22 (Fig. 2) is secured on the end of the rod III, and when the cam follower I06 engages the depression II! or the depression II 8 formed on the periphery of the cam I03, the screw I22 strikes a spring-pressed plunger I24 of a microswitch I25 and holds a contactor I25 (Fig. 5) of the microswitch out o engagement with contacts I30 and I3I. When the cam I03 (Fig. 2) has been moved so that the cam follower I06 is out of engagement with both of the depressions II! and H8, the screw I22 is moved away from the spring-pressed plunger I24 and permits the plunger to move the contactor I26 (Fig. 5) into engagement with the contacts I30 and I3I.- When the cam follower I06 (Fig. 2) next engages one of the depressions I I1 and H8, the adjustment screw actuates the spring-pressed plunger I24 so that the plunger moves the contactor I26 (Fig. 5) out of engagement with the contacts I30 and I3I and holds it out of engagement therewith.

A supply reel I32 (Fig. 2) mounted rotatably on a holder I33 contains a supply of a whipping wire. I34. The wire I34 is drawn through an opening I40 formed in aiguide I36 (Figs. 2 and 4) of a tensioning device I35. The guide I36 is slidably mounted upon arod MI and is urged upwardly on the rod by a compression spring I42, which upward movement of the guide I26 is limited by a nut I43 threaded on the upper end of the rod MI. The guide I36 issecu'red against rotation on the rod I by keys I45-I45 (Fig. 4) projecting from the guide into a keyway I44 formed in the rod MI. The wire I34 passes from the'tensioning device I35, under a guide roller I 46 (Fig. 2') and through a. breakingmechanism I50 comprising a pair of spring-pressed discs, which are illustrated by a discv I41.

The wire I34.- then is directed through thehollow shaft 2.2 to the whipping head 25 where it. is accessible for whipping a conductor I51 ofa cord I58 held on the work-holder II6, when the. head 25 is rotated about. the conductor I51 and the work-holder II6 moves the cord I58 away' from the whipping head. When: the whipping head. 25 is. rotated about the conductor, the wire I34. is wrapped around the conductor I51 in a. close uniform spiral: and is drawn from the supply reel I32, through the guide I36, under the roller I46, and through the braking mechanism I50, which places the. wire under tension. The tensioning device I35. serves to maintain the wire I34 under tension, asthe wire passes through, the opening I40. in the guide. I36 to the roller I46, in that. the compression spring I42. urges the. guide. I36. upwardly. When the tension of' the wire I34 is sufiiciently great; the guide I 36 is slid downwardly on the rod I4I against the action of the spring I42.

A circuit for controlling the operation of the apparatus described hereinabove is illustrated in Fig; 5, and includes a conventional. timer: I60 having a timer motor I6I, which is connected to a power line I62. through a conductor I63 of the. power line. The timer motor I 6| also is connected tothe power line I62 through a conductor I64, a safety'switch I65, conductors I66 and I10, a contact I1I of a foot-operated switch I12, a contactor I13 of the switch I12, a contact I15 of the switch I12, and a conductor I16, which is connected. to a conductor I80 of the power line I62; Th foot-operated switch I12 includes a toggle actuating mechanism I14, which is designed, when actuated, to. move the contactor I13 into engagement with the contacts In and I15 and lock the contactor I13 in that. position. When the toggle. mechanism. I14 is again actuated it will move the contactor I 13 out of engagement with the contacts HI and; I15, thereby breaking the circuit to themotor I6 I.

The timer: I60 (Fig. 5) also includes a clutch coil I8I connected in parallel with the timer motor I6I by conductors I82: and I83, which are connected to the conductors. I66. and I63, respectively. When the contactor I13 is in engagement with contacts HI and I15, the clutchcoil, I8I is energized and moves a contactor I34 into engagement with a contact I85. The contactor I84 is connected to the conductor I80 of the power line I62 by a conductor I86, and the contact I85 isconnected to a contact I9 I. by a conductor I90. A contactor I92 normally in. engagement. with the contact I9I is connected, by conductors. I93 and I94 to one end of the winding 10 of the solenoid 63, and a conductor I95 connects. the other end of the winding 10. to the conductor I63 of the power line I62 The conductor I93. also connects the contactor I92 and the conductor I94 to the contact I30 of the microswitch I25, and the.- other contactv I3,I of the microswitch isconnected by a conductor I96. to theconductor. I90. A. filament 200. of an incandescent lampI is connected by conductors 202 and 203- to the conductors I10 and I63, respectively.

In. the operation of the apparatusv described hereinabove, the. switch. I1 (Fig. l) is. actuated to turn the. motor II on,. the, cord. I58 (Fig. 2) having the conductor I51, which is. to be whipped, is. positioned in. the work-holder H5 andv the end of the wire. I34. is wrapped around the conductor I51. The foot-operated switch I12 (Fig.15); thenrisf actuated to; move. the contactor I13 into; engagement with the; contacts. III and I15, and the. toggle.- mechanism I14. latches the contactor. I13 irr. that position. This closes the circuit; to the motor I6.I of the; timer I60 and at the. same. time energizes the clutch coil. I BI, whereby the. contactor I84 is moved into engagementwith the contact. I285. When the contactor I84: is engaged the; contactor I85, the winding 10 ofthe. solenoid, 63 isenergized from the power line I62. through the conductor I80 and I86, the contactor I84, the-contact I85, the cond ct r the. contact IsBI,v the contactor I92, which is in engagement with the contact I90 at this time, andthe-conductors. I93 and I94,.and through the conductors I63and; I95.

When the winding 10 (Fig. 2) of the solenoid 63 is energized, the core 62 is. drawn downwardly, whereby the. driven clutch. dis 35 is moved into engagement with the. driving clutch disc I-5, which is rotated. continuously by the motor I I, the brake band. 8.2 is, moved out of braking engagement with the. brakev drum 33, and the. lever 90 is drawn out of the path; of rotation of the indexing lug 93. causes. the hollow shaft 22 and the whipping head 25 to berotated and. the wire I34 iswound upon thexendof the conductor I51 of a cord positionedin, the work-holder IIB.

As the hollow shaft. 22 (Fig. 2) is rotated, the worm gear I00 is rotated and turns the gear I0-I, thereby turning. the shaft I02 and the cam I03. Asthe cam I03- is turned, the cam follower I06 is movedto the. left,. as viewed in Fig. 2, by the gradual rise onthe. periphery of the cam, thereby moving the work-holder H6 and the conductor I51 to. the left. at a. uniform: rate'of speed. This causes the whipping head 25 to serve the wire I34 on. the. end of, the conductor I51 in the form of an even spiral. Shortly after the rod III startsto move: to the left, as viewed in Fig. 2, the adjustment screw- I22 carried by the rod III is moved to. theleftsufiiciently topermit the. springpressed: plunger I24. to move the. contactor. I26 (Fig. 5.) into engagement with the contacts I30 and BI... Shortly thereafter. the timer motor I.6I causes the. engagement between the contactor I92 and the. contact I9I. to be. broken and to remain broken as long as the. motor I6I continues to. run.. However, this. does not. cause the winding 10 of the solenoid 63 to be de-energizedbecause the winding 10 then. will be energizedfrom the power linev I62 through the. conductors I30 and I86,. the contactor I84, the contact I85, the conductors I90. and. l9fi,.the contact IN, the contactor I261, the contact I 30, and the conductors I93 and I94, and through. the conductors I63 and I95. That is to say, the microswitch I25 and the contactor I92and the contact I9I are in parallel with. the winding 10, and whenever the contactor I84 is in engagement with the contact I and either the microswitch I25 is closed, or the contactor" I92 is in engagement with the contact I9I, the winding 10 will be energized.

As the cam I03 (Fig. 2) continues to rotate, the cam follower I06 and the work-holder H6 continue to move to theleft, as viewed in Fig. 2. However, when the cam follower I06 rides over the lobe; I05 and is pressed into engagement with the depression Hi1, the work-holder H6 is snapped backinto: the position shown in Fig. 2, and the; adjustment. screw I22 engages the springpressedplunger' I24 and moves the contactor I26 (Fig. 5). out of engagement with the contacts. I30 and. I3I., whereby the. circuit. to the winding 10 of the solenoid 63.i's broken.

The tension springs 6'4-6'4' (Fig. 1) then cause the driven clutch disc 35 to be moved out of engagement with the clutch disc I5, the brake band 82 to be moved into braking engagement with the brake drum 33, and the arm 90 to be moved into the path of movement of the indexing lug 93. The brake band 82 then slows down the rotation of the brake drum 33 and the hollow shaft 22, which rotation is entirely stopped when the indexing lug 93 strikes the arm 90. However, any shock is prevented by the compression spring 94 (Fig. 3), which permits the shaft SI and the arm 80 to give somewhat when the indexing lug 93 strikes the arm 90 but does so without interfering with the stopping of the rotation of the lug. Thus, the whipping head 25 is brought to rest in a position convenient to start another whipping operation.

The toggle mechanism I14 (Fig. 5) then is actuated to move the contactor I13 out of engagement with the contacts HI and I15, whereby the timer motor I6I is de-energizedthe lamp 20I is darkened, the clutch coil I8I is de-energized, which causes the contactor I84 to be moved out of engagement with the contact I85, the timer I60 resets to zero, and the contactor I02 moves back into engagement with the contact I9I. The cord I 58 and the conductor I51 just Whipped then may be removed and the operations described hereinabove repeated upon the conductor of another cord.

The apparatus described hereinabove automatically applies whippings of uniform lengths and pitches to conductors of cords, such as the cord I58. It also discourages operators thereof from shortening the whippings of the conductors, since if the switch I12 is actuated to move the contactor I13 out of engagement with the contacts Ill and I15 before a whipping operation is stopped automatically, the timer I60 resets to zero, but the apparatus is in a point in its cycle in which a portion of the periphery of the cam I03 intermediate the depressions H1 and. H8 engages the follower I06. In this position the spring-pressed plunger I24 maintains the engagement of the contactor I26 and the contacts I30 and I3I, and shortly after the switch I12 is reclosed to start another whipping operation, the contactor I92 is moved out of engagement with the contact IBI so that the apparatus is stopped when one of the depressions I I1 and H8 are engaged by the follower I06 and the adjustment screw I22 engages the plunger I24 to open the microswitch I25. This stops the apparatus, except for the motor I I and the driving clutch disc I5, and the switch I12 must be reclosed if it is desired to continue the whipping.

Also, when the follower I06 is moved into engagement with one of the depressions I I1 and I I8 and the whipping is stopped, the work-holder I I6 is moved back from its extreme left hand position to its extreme right hand position, as viewed in Fig. 2, and the conductor I51 being whipped also is moved to the right. Consequently, if the whipping is resumed on the partially whipped conductor, the subsequent whipping will overlap the previously applied whipping and may be detected easily by a supervisor, If further whipping is not conducted on the partially whipped conductor, the length of the whipping will be so short when compared with a whipping of normal length that it may be detected easily by a supervisor. Consequently, any tendency to shorten the whippings is prevented for all practical purposes. However, if an emergency arises, the apparatus may be stopped by opening the switch I12 (Fig. 5).

The cam I03 can be replaced with others of different size and shape to vary the length and lay of the whippings applied by the whipping head 25. For example, if the length of whippings are to be shortened, a cam 303 having three lobes 304304 (Fig. 6) thereon, ma be substituted for the cam I03, the lobes 304-404 being smaller than the lobes I04 and I05. The number of teeth I08-I08 (Fig. 2) on the gear IOI is an integral multiple of each of the various numbers of the lobes on the cams I03 and 303. Consequently, the number of teeth I08I08 are a multiple of six. Cams more than three lobes thereon also may be used if the number of teeth I08I03 is also a multiple of the greater number of lobes. Thus, regardless of which of the cams is used with the apparatus, in each whipping operation the adjustment screw I22 will strike the springpressed plunger I24 when the indexing lug 93 is in a predetermined point in a cycle of revolution thereof, whereby the brake band 82 always is moved into braking engagement with the brake drum 33 when the indexing lug has a predetermined portion of a revolution left to make before striking the arm 90. Consequently, the lug strikes the arm with only a predetermined amount of force, which amount always is uniform. Thus, the apparatus may be utilized for whipping different types of cords which require different kinds of whippings on conductors forming parts thereof, but the whipping applied for any given type of cord will be uniform.

What is claimed is:

1. In a whipping apparatus, means for holding a conductor, a whipping head, means for rotating the whipping head around a conductor held by the holding means to wind a strand around the conductor, means for moving the holding means relative to the whipping head, and means for braking the rotating means after the holding means has been moved a predetermined distance relative to the whipping head.

2. In a whipping apparatus, means for holding a conductor, a whipping head, means for rotating the whipping head around a conductor held by the holding means to wind a strand around the conductor, means for moving the holding means slowly in one direction relative to the whipping head, means for rapidly moving the holding means in the opposite direction, after the holding means has been moved a predetermined distance in the first-mentioned direction, and a brake for retarding the rotating means after the holding means has been moved a predetermined distance relative to the whipping head.

3. In a whipping apparatus, means for holding a conductor, a whipping head, means for rotating the whipping head around a conductor held by the holding means to wind a strand around the conductor, means for moving the holding means relative to the whipping head, a brake for retarding the rotating means after the holding means has been moved a predetermined distance relative to the whipping head, and means for stopping the whipping head in a predetermined position relative to the holding means.

4. In a whipping apparatus, means for holding a conductor, a whipping head, means for rotating the whipping head around a conductor held by the holding means to serve a strand upon the conductor, means for reciprocating the holding means relative to the whipping head to distribute the servings of the strand on the conductor, and

means :for controlling the operation of the reciprocating means and the rotating means comprising a normally closed switch, means for opening the normally closed switch a few seconds after the start of a whipping operation, a second switch in parallel with the first-mentioned-switch, and means associatedwith the reciprocating means serving to close the second switch just before the first-mentioned switch'is opened and to open the second switch after the holding means has been reciprocated once, whereby the reciprocating means and the rotating means are stopped after the holding means has reciprocated once.

5. In a whipping apparatus, means for holding a conductor, a whipping head, means for rotating the whipping head around a conductor held by the holding means to serve a strand upon the conductor, means for reciprocating the holding means relative to the whipping head to distribute the servings of the strand on the conductor, and means for controlling the operation of the reciprocating means and the rotating means comprising a manually operable switch for starting the operation of the reciprocating and the rotating means, a normally closed switch, a timer for opening the normally closed switch a few seconds after the start of a whipping operation, a second switch in parallel with the first-mentioned switch, and means associated with the reciprocating means serving to close the second switch just before the first-mentioned switch is opened and to open the second switch after the holding means has been reciprocated once, whereby the reciprocating means and the rotating means are stopped after the holding means has reciprocated once.

6. In a whipping apparatus, means for holding a conductor, a whipping head, means for rotating the whipping head around a conductor held by the holding means to serve a strand upon the conductor, a cam, means associated with the rotating means for rotating the cam, a cam follower associated with the cam for reciprocating the holding means relative to the whipping head to distribute the servings of the strand on the conductor, means for driving the rotating means and the reciprocating means, a clutch interposed between the driving means and the rotating means and reciprocating means, and means for controlling the operation of the clutch including a solenoid, means operated by the solenoid for engaging the clutch when the solenoid is energized, a normally closed switch in series with the solenoid, means for opening the normally closed switch a few seconds after the start of a whipping operation, a second switch in parallel with the first-mentioned switch, and means associated with the cam follower serving to close the vsecond switch just before the first-mentioned switch is opened and to open the second switch after the holding means has been reciprocated once, whereby the clutch is disengaged after the holding means has reciprocated once.

7. In a whipping apparatus, means for holding a conductor, a whipping head, means for rotating the whipping head around a conductor held by the holding means to serve a strand upon the conductor, means for reciprocating the holding means relative to the whipping head to distribute the servings of a strand being served by the whipping head upon the conductor. means for drawing the rotating and the reciprocatin means. a brake for slowing the rotating means and the reciprocating means. means for stoppin the rotating means at a predetermined point in its rotation to index the whipping head relative to the holding means, actuating means serving to release the brake and indexing means when operated and to apply the brake and the indexing means when not operated, and means for automatically stopping the operation of the actuating means after a single reciprocation of the holding means.

8. In a whipping apparatus, means 'for holding a conductor, a whipping head, means for rotating the whipping head around a conductor held by the holding means to wind a strand around the conductor, means for reciprocating the holding means relative to the whipping head, means for stopping the holding means and the rotating means, a solenoid serving to operate the stopping means when de-energized, timing means including a switch for energizing the solenoid when closed and means for opening the switch a few seconds after the timing means are energized, manually controlled means for controlling the energization of the timing means, a microswitch in parallel with the first-mentioned switch, and means associated with the reciprocating means serving to close the microswitch just before the first-mentioned switch is opened and to open the microswitch at the end of a single reciprocation of the holding means, whereby the solenoid is de-energized at the end of a single reciprocation of the holding means.

9. In a whipping apparatus, means for holding a conductor, a whipping head, means for rotating the Whipping head around a conductor held by the holding means to serve a strand upon the conductor, means for reciprocating the holding means relative to the whipping head to distribute the servings of a strand being served by the whipping head upon the conductor, means for driving the rotating means and the reciprocating means, a clutch for connecting the driving means to the reciprocating means and the rotating means, a brake for slowing the rotating means and the reciprocating means, means for stopping the rotating means at a predetermined point in its rotation to index the whipping head relative to the holding means, actuating means serving to engage the clutch and to release the brake and indexing means when operated and to disengage the clutch and to apply the brake and the indexing means when not operated, a sole noid serving when energized to operate the actuating means, timing means including a switch for energizing the solenoid when closed and means for opening the switch a few seconds after the timing means is energized, manually controlled means for controlling the energization of the timing means, a microswitch in parallel with the first-mentioned switch, and means associated with the reciprocating means serving to close the microswitch just before the first-mentioned switch is opened and to open the microswitch at the end of a single reciprocation of the holding means, whereby the solenoid is de-energized at the end of a single reciprocation of the holding means.

10. In a whipping apparatus, means for holding a conductor, a whipping head means for rotating the whipping head around a conductor held by the holding means to Wind a strand around the conductor, a cam having a plurality of lobes formed thereon, a shaft for mounting the cam, a gear having a predetermined number of teeth formed thereon secured to the shaft, a second gear driven by the rotating means for rotating the whipping head around a conductor held by the holding means to wind a strand around the conductor, means for moving the holding means relative to the whipping head, a brake for stopping the rotating means after the holding means has been moved a, predetermined distance relative to the whipping head, means for stopping the rotation: of the whipping head in a predetermined position; relative to the holding means, and means for actuating the brake when the whipping head is at a predetermined point in a revolution thereof.

ALEXANDER C. F'RANKWICI'I. 

